208 lines
7.1 KiB
Python
Executable File
208 lines
7.1 KiB
Python
Executable File
# This file implements a class which forms an interface to the .cddb
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# directory that is maintained by SGI's cdman program.
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#
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# Usage is as follows:
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#
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# import readcd
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# r = readcd.Readcd()
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# c = Cddb(r.gettrackinfo())
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#
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# Now you can use c.artist, c.title and c.track[trackno] (where trackno
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# starts at 1). When the CD is not recognized, all values will be the empty
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# string.
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# It is also possible to set the above mentioned variables to new values.
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# You can then use c.write() to write out the changed values to the
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# .cdplayerrc file.
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from warnings import warnpy3k
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warnpy3k("the cddb module has been removed in Python 3.0", stacklevel=2)
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del warnpy3k
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import string, posix, os
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_cddbrc = '.cddb'
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_DB_ID_NTRACKS = 5
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_dbid_map = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ@_=+abcdefghijklmnopqrstuvwxyz'
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def _dbid(v):
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if v >= len(_dbid_map):
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return string.zfill(v, 2)
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else:
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return _dbid_map[v]
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def tochash(toc):
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if type(toc) == type(''):
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tracklist = []
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for i in range(2, len(toc), 4):
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tracklist.append((None,
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(int(toc[i:i+2]),
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int(toc[i+2:i+4]))))
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else:
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tracklist = toc
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ntracks = len(tracklist)
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hash = _dbid((ntracks >> 4) & 0xF) + _dbid(ntracks & 0xF)
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if ntracks <= _DB_ID_NTRACKS:
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nidtracks = ntracks
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else:
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nidtracks = _DB_ID_NTRACKS - 1
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min = 0
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sec = 0
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for track in tracklist:
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start, length = track
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min = min + length[0]
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sec = sec + length[1]
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min = min + sec / 60
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sec = sec % 60
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hash = hash + _dbid(min) + _dbid(sec)
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for i in range(nidtracks):
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start, length = tracklist[i]
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hash = hash + _dbid(length[0]) + _dbid(length[1])
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return hash
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class Cddb:
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def __init__(self, tracklist):
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if os.environ.has_key('CDDB_PATH'):
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path = os.environ['CDDB_PATH']
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cddb_path = path.split(',')
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else:
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home = os.environ['HOME']
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cddb_path = [home + '/' + _cddbrc]
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self._get_id(tracklist)
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for dir in cddb_path:
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file = dir + '/' + self.id + '.rdb'
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try:
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f = open(file, 'r')
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self.file = file
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break
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except IOError:
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pass
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ntracks = int(self.id[:2], 16)
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self.artist = ''
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self.title = ''
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self.track = [None] + [''] * ntracks
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self.trackartist = [None] + [''] * ntracks
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self.notes = []
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if not hasattr(self, 'file'):
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return
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import re
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reg = re.compile(r'^([^.]*)\.([^:]*):[\t ]+(.*)')
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while 1:
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line = f.readline()
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if not line:
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break
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match = reg.match(line)
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if not match:
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print 'syntax error in ' + file
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continue
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name1, name2, value = match.group(1, 2, 3)
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if name1 == 'album':
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if name2 == 'artist':
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self.artist = value
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elif name2 == 'title':
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self.title = value
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elif name2 == 'toc':
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if not self.toc:
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self.toc = value
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if self.toc != value:
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print 'toc\'s don\'t match'
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elif name2 == 'notes':
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self.notes.append(value)
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elif name1[:5] == 'track':
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try:
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trackno = int(name1[5:])
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except strings.atoi_error:
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print 'syntax error in ' + file
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continue
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if trackno > ntracks:
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print 'track number %r in file %r out of range' % (trackno, file)
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continue
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if name2 == 'title':
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self.track[trackno] = value
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elif name2 == 'artist':
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self.trackartist[trackno] = value
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f.close()
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for i in range(2, len(self.track)):
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track = self.track[i]
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# if track title starts with `,', use initial part
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# of previous track's title
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if track and track[0] == ',':
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try:
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off = self.track[i - 1].index(',')
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except ValueError:
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pass
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else:
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self.track[i] = self.track[i-1][:off] \
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+ track
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def _get_id(self, tracklist):
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# fill in self.id and self.toc.
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# if the argument is a string ending in .rdb, the part
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# upto the suffix is taken as the id.
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if type(tracklist) == type(''):
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if tracklist[-4:] == '.rdb':
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self.id = tracklist[:-4]
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self.toc = ''
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return
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t = []
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for i in range(2, len(tracklist), 4):
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t.append((None, \
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(int(tracklist[i:i+2]), \
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int(tracklist[i+2:i+4]))))
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tracklist = t
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ntracks = len(tracklist)
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self.id = _dbid((ntracks >> 4) & 0xF) + _dbid(ntracks & 0xF)
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if ntracks <= _DB_ID_NTRACKS:
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nidtracks = ntracks
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else:
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nidtracks = _DB_ID_NTRACKS - 1
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min = 0
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sec = 0
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for track in tracklist:
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start, length = track
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min = min + length[0]
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sec = sec + length[1]
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min = min + sec / 60
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sec = sec % 60
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self.id = self.id + _dbid(min) + _dbid(sec)
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for i in range(nidtracks):
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start, length = tracklist[i]
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self.id = self.id + _dbid(length[0]) + _dbid(length[1])
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self.toc = string.zfill(ntracks, 2)
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for track in tracklist:
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start, length = track
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self.toc = self.toc + string.zfill(length[0], 2) + \
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string.zfill(length[1], 2)
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def write(self):
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import posixpath
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if os.environ.has_key('CDDB_WRITE_DIR'):
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dir = os.environ['CDDB_WRITE_DIR']
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else:
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dir = os.environ['HOME'] + '/' + _cddbrc
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file = dir + '/' + self.id + '.rdb'
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if posixpath.exists(file):
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# make backup copy
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posix.rename(file, file + '~')
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f = open(file, 'w')
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f.write('album.title:\t' + self.title + '\n')
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f.write('album.artist:\t' + self.artist + '\n')
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f.write('album.toc:\t' + self.toc + '\n')
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for note in self.notes:
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f.write('album.notes:\t' + note + '\n')
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prevpref = None
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for i in range(1, len(self.track)):
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if self.trackartist[i]:
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f.write('track%r.artist:\t%s\n' % (i, self.trackartist[i]))
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track = self.track[i]
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try:
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off = track.index(',')
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except ValuError:
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prevpref = None
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else:
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if prevpref and track[:off] == prevpref:
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track = track[off:]
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else:
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prevpref = track[:off]
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f.write('track%r.title:\t%s\n' % (i, track))
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f.close()
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